Inserting Presenter Presentation into iframe not working on mobile devices

Working on integrating Adobe Presenter content to play inside an iframe in a Moodle lesson.  Pretty straightforward and works but breaks when playing inside a mobile browser either safari or chrome.  Works if played on chrome mobile but requested as desktop site.

Video plays fine outside of iframe on all devices.

Videos should be in htmL5 format.

https://signal.cty.jhu.edu/CompSci/JV1/Unit_7/Lecture_7.1/index.htm  - is the Adobe Presenter Presentation.

Not a cross-domain request so that doesn't seem to be the issue.

youtube videos that arealso embedded in iframe on same lesson display fine

below shows the .gif that spins without loading --- but showing youtube emedded video showing